I've posted reviews of some of these in the "Plate Lunch Review" Thread, but here's a list of the San Diego local Plate Lunch places:
Bamboo Hut - 9172 Mira Mesa Blvd,San Diego, Ca. Phone: (858)-348-0414
Also a decent sushi place, and possibly my favorite Spam Musubi.
Da Kitchen Cafe - 9823 Carroll Canyon Road, San Diego Ca. Phone: 858-271-8268 Website: http://www.da-kitchen.com/
I haven't visited here yet. I think this is operated by the same people as Da Kitchen on Maui?
Da Kine's Plate Lunch - 4120 Mission Blvd. #208 (The Promenade), San Diego, Ca. Phone: (858) 274-8494 Website: http://www.dakines.com/
Kalua pig plate & a slice of Haupia cake, please! Also in the South Bay - 1635 Sweetwater Road (at Prospect), National City, Ca. Phone: 619-477-8494
Hawaiian Island Barbecue Pacific Plaza, 1768 Garnet Avenue. San Diego, Ca. Phone: 858-483-9830
Surfer hangout decor & a steady trickle of customers makes this a nice place to stop in for Chicken Katsu. Not the greatest, but there's no lines & service is passable.
Island Boy Grille - 10066 Pacific Heights Blvd., Sorrento Mesa San Diego, Ca. Phone: (619) 452-7708 Website: http://www.islandboygrille.com/
The second closest Plate Lunch to my work and one of my all time favorites, I've never had a bad plate here. I've got some pictures I want to post soon, including several Tikis & a Primo Beer shadowbox.
Kealani's - 137 West D Street, Encinitas, Ca. Phone: (760) 94-ALOHA
This one's on my Must Visit list: from malasadas to musubi, from a cup of saimin to kahuna-sized plates of kalua pig, with occasional luchtime Uke serenades. Also an Oceanside location (I believe Al-ii recomends this one?): 207 N. Coast Highway 101, Oceanside, Ca.
Phone: (760) 72-ALOHA
L & L BBQ - Various locations:
Sweetwater Towne & Country Center 1860-B Sweetwater Road, National City, Ca. Phone: (619) 336-6888 Fax: (619) 336-9988
Ralph's Shopping Center 4225 Oceanside Boulevard, Suite E, Oceanside, Ca. Phone: (760) 726-0888
2455 D Vista Way, Oceanside, Ca. Phone: (760) 722-8383
Campus Plaza 6083 El Cajon Boulevard, Suite 5B-1, San Diego, Ca. Phone: (619) 229-6888
Mira Mesa Mall 8280-A Mira Mesa Blvd., San Diego, Ca. Phone: (858) 693-5888
3145 Sports Arena Blvd. #102,San Diego, Ca. Phone: (619) 223-8888
Website: http://www.hawaiianbarbecue.com/
That last location is Point Loma/Sports Arena, the closest to Shelter Island. The McDonald's of Mainland Plate Lunch (I mean that in a good way), L & L isn't flashy but you can be sure of getting the same good quality of food & service at each location.
Ohana Hawaiian Island BBQ - Bay Plaza 1430 E. Plaza Blvd Unit E-7A, National City, Ca. Phone: (619) 336-9889 Fax: (619) 336-9886 Website: http://www.hawaiianislandbbq.com/
If L & L is McDonalds, this chain might be Burger King, or at least Jack in the Box. Also a location in Oceanside: Mission Market Place
459-2 College Boulevard, Oceanside, Ca. Phone: 760.630.6800
Tiki Hut Island Grille and Sushi - 5131 College Avenue #F, San Diego, Ca. Phone: (619)-286-5184 Fax (619)-286-5185
I've gotten good food & fairly pathetic food here, the best thing I've been able to say about them is they're open 'til 6 PM and on weekends while Island Boy isn't. Their Sorrento Valley location is the closest Plate Lunch to my work: 9450 Scranton Rd Ste 114d
San Diego, Ca. Phone: (858) 646-0914
Yokozuna's Sushi Bar & Islander Grill - 10920 Roselle St., Ste. 107, San Diego, Ca. Phone: (858)-450-4690 Website: http://www.yokozunas.com
Although it's pretty close to my work, and I'm intrigued by the Guamanian specialties, I haven't been here yet. There's also a South Bay location: 945 Otay Lakes Rd., Ste. M, Chula Vista, Ca. Phone: (619)-482-0134